Kodi Discharge Cycle ndi chiyani?

Anayimba foni Lachiwiri lapitali ndikuyambitsa kupanga chipangizo chawo choyamba cham'manja. PM amandifunsa kuti ndi kangati ogwiritsa ntchito amatha kulipiritsa batire. Ndidati zimatengera. Anafuna nambala. Ndinamuuza 500, mwinamwake, pansi pamikhalidwe yabwino yomwe sidzakhalapo m'munda.

Ndilo vuto la kutulutsa kotulutsa madzi. Lingaliroli ndi losavuta koma kugwiritsa ntchito pazinthu zenizeni kumakhala kovuta mwachangu.

Batire lanu siliwerengera-mapulagi. Zimawerengera kuchuluka kwa mphamvu. Tengani 100% ya nameplate mphamvu ndipo ndiye kuzungulira kumodzi. Chitani kaphokoso kamodzi kapena falitsani kwa sabata yotulutsa pang'ono - zotsatira zofanana.

The 18650 yomwe ili mu tochi yanu pakali pano ikhoza kukhala pa cycle 47 kapena cycle 212. Pokhapokha mutakhala mukutsata amp-maola achipembedzo, simukudziwa. Selo ndithudi silikudziwa. Mulibe kauntala kakang'ono mkati. BMS yanu imayerekeza kutengera kuwerengera kwa coulomb, ndi kuwerengera kwa coulomb. Ndalekanitsa mapaketi pomwe kuchuluka kwa kuzungulira komwe kunanenedwa kunatsika ndi 30% poyerekeza ndi ukalamba weniweni wa kalendala.

Samsung SDI idasindikizanso zina mu 2019 kuwonetsa ma cell awo 21700 akugunda 83% kusungidwa kwa mphamvu pa cycle 300 pansi pa protocol yawo yoyeserera. Ma cell a Panasonic NCR kuyambira nthawi yomweyo anali ngati 78% pamizere ya 300. Manambalawa anachokera ku zipinda zanyengo pa madigiri 23 ndi CC{{9}CV chotcha pa 0.5C ndi kutulutsa pa 1C mpaka 2.5V cutoff. Makilomita anu amasiyana chifukwa chogwiritsira ntchito si chipinda cha nyengo.

Aliyense mumakampaniwa amalankhula za kuya kwa kutulutsa ngati mtundu wina wamatsenga. Kuzungulira kozama kumakulitsa moyo, kuzungulira kwakuya kumapha maselo mwachangu. Zoona mokwanira. Koma ubwenzi si umene anthu ambiri amayembekezera.

Ndidayendetsa projekiti yam'mbali mu 2021 ndikuyesera kuwerengera izi kwa kasitomala wamankhwala. Tidatenga ma cell 200 kuchokera kumalo opangira omwewo, kuwagawa m'magulu, ndikuwayendetsa pamagawo osiyanasiyana a DoD kwa miyezi isanu ndi itatu. Gulu la 100% la DoD linazungulira kuzungulira 380. Gulu la 60% la DoD linali lidakali pa 88% mphamvu yofanana ndi 900 yozungulira. Gulu la 30% la DoD silinawonetse kunyozeka konse pakatha chaka.

Koma apa pali zimene datasheets sadzakuuzani inu. Kukalamba kwa kalendala kunali kudya m'magulu onse pafupifupi mofanana posatengera njinga. Pofika mwezi wakhumi, ngakhale ma cell omwe tidangowagwira sanawagwire anali atataya mphamvu 4-5% atakhala pamenepo 50% akuwongolera muchipinda cha digirii 25. Maselo amayenda movutikira anali kugunda mbali zonse ziwiri - kukalamba kwa mkombero komanso ukalamba wa kalendala pamwamba pa wina ndi mnzake.

Ndiye kasitomala wanu akakufunsani chifukwa chomwe chida chawo -zaka ziwiri{1}}chikhala sichikhalitsa ngakhale "sanachigwiritse ntchito" - ndichifukwa chake.

Discharge Cycle

Ndili ndi bokosi la ma cell mu garaja yanga kuchokera pa batire ya ngolo ya gofu yomwe idakhala nyengo yotentha itatu mu shedi ku Tucson. Mwini analumbira kuti amangogwiritsa ntchito ngoloyo mwina kawiri pamwezi. Paketi idavotera mizungu 2000. Zinafa pa 160. Maselo ankawoneka bwino kunja. Inang'ambika ndipo jelly roll inali ndi mawanga abulauni pa cholekanitsa. Electrolyte inali itawola pang'ono.

Kutentha kumapha maselo a lithiamu. Osafulumira ngati wamfupi wakufa. Mochedwa, ngati kusiya batala pa kauntala.

Ubale wa Arrhenius umakupatsani chiwopsezo cha 2x pa digirii iliyonse ya 10 pamwamba pa 25 digiri. Koma ndiwo avareji m'makhemistri onse. Ma cell a NMC omwe ndidawayesa adagwa mwachangu. LFP idakhazikika bwino. Ma cell a thumba omwe timagwiritsa ntchito pazovala amamva bwino kuposa ma cylindrical cell okhala ndi chemistry yofanana chifukwa kuchuluka kwa matenthedwe kumakhala kocheperako ndipo amawotcha kwambiri akamanyamula.

Kutulutsa kozizira kumakwiyitsa koma sikuwononga. Mukutaya mphamvu kwakanthawi. Zimabwereranso pamene selo litenthedwa. Ndatulutsa ma cell pa -madigiri 15 omwe amangopatsa 61% ya mphamvu zovoteledwa, ndiye kuti atenthedwe ndi kutentha pang'ono ndikupeza 3.2Ah yodzaza ndikadzatulutsanso. Kuzizira kozizira ndiko kupha - lithiamu plating pa anode. Kuwonongeka kumeneko ndi kosatha. BMS yambiri imatsekera kunja kulipiritsa pansi pa 0 digiri pazifukwa izi.

Kutulutsa kulikonse kumasuntha ayoni a lithiamu kuchokera ku graphite anode kupita ku cathode. Kulipira kulikonse kumakankhira kumbuyo. Chitani izi nthawi zokwanira ndipo zinthu zimayamba kuwonongeka.

Gawo la SEI pa anode limakhuthala. Chigawo chimenecho chikuyenera kukhala pamenepo - chimateteza graphite ku electrolyte. Koma imakula ndi kuzungulira kulikonse, ndipo kukula kumatanthauza kuti ikudya lifiyamu yomwe ingasunge mphamvu. Ichi ndichifukwa chake mphamvu zimatha ngakhale palibe chodabwitsa chomwe chimachitika.

Ma particles a cathode amatha. Ma cathodes a NMC ndi NCA ali ndi mawonekedwe a kristalo omwe amakula ndikulumikizana ngati lithiamu imayenda ndikutuluka. Mawonekedwe a Micro{2}cracks. Chigawo chapamwamba chikuwonjezeka. Zotsatira za mbali zimathamanga. Ndawonapo tizigawo tating'onoting'ono ta-ma cell a ma cathode okwera-omwe amaoneka ngati magalasi osweka pansi pa maikulosikopu poyerekeza ndi ma cell atsopano ochokera mugulu lomwelo.

Ma electrolyte amawonongeka. Madzi otsatizana amabweretsa mavuto. Mphamvu yamagetsi imathandizira kutulutsa okosijeni. Mutha kukhala ndi kutulutsa mpweya, kuchuluka kwa impedance, ndipo pamapeto pake cell imafufuma kapena kutuluka.

Palibe mwa izi zimachitika mofanana. Maselo a mndandanda wanu omwe amathamanga kwambiri kapena amayamba ndi msinkhu wocheperako pang'ono mofulumira. Pakatha chaka chimodzi kapena ziwiri, paketi yanu "yofananira" siyikufanananso. Selo lofooka limaletsa chingwe chonsecho kuti chisatuluke ndipo amalimbikira kuyesera kuti apitirize. Imfa yozungulira kuyambira pamenepo.

IEC 62660 ndi milingo yosiyanasiyana ya UL imakupatsani zoyambira. Kudutsa izo ndipo mukhoza kutumiza mankhwala. Koma ndinayang'ana kuyesedwa kwa certification ya ma cell ndikuwonetsa kubwerera kumunda miyezi isanu ndi umodzi pambuyo pake ndi matumba otupa.

Mayeso a certification adapangidwa kuti azibwerezabwereza ma lab onse, osati kutengera kugwiritsa ntchito kwenikweni. Palibe amene amagwiritsa ntchito foni yake pa 0.5C nthawi zonse. Palibe amene amachajisa chida chawo pamlingo wokwanira wa CC-CV mbiri pa 25 degrees .

Ngati mukufunitsitsa kumvetsetsa momwe paketi yanu idzagwirira ntchito, muyenera kupanga protocol yoyeserera yomwe ikugwirizana ndi wosuta wanu weniweni. Lembani zomwe mukuyembekezera kuti mutulutse. Phatikizanipo nthawi yopuma. Yang'anani kutentha kwambiri komwe katundu wanu adzawona. Thamangani ma cell okwanira kuti mukhale ndi chidaliro chowerengera - ndipo zikutanthauza kuti osachepera 15-20 pa mayeso aliwonse, osati 3-5 omwe oyambitsa ambiri amayesa kuthawa.

Maselo omwe amalephera kuyesedwa koyambirira kwa moyo pafupifupi nthawi zonse amakhala ndi zolakwika zopanga. Burrs pa elekitirodi, kuipitsidwa, welds zoipa pa tabu. Izi ziwoneka m'mizere 50 yoyambirira. Maselo omwe amalephera mochedwa - ndi omwe amakuuzani zinazake za kapangidwe kanu.

Mutha kuwerengera moyo wozungulira womwe ukuyembekezeka ngati mukudziwa mbiri yanu. Foni yomwe imakhala ndi chaji tsiku lililonse, mwina imatsika mpaka 20% pafupipafupi musanayike - zomwe zimazungulira pafupifupi 0.8 patsiku. Pazaka ziwiri{5}zoyembekezeredwa kukhala ndi moyo, mukuyang'ana ma 580 cycle. Ngati ma cell anu adavotera maulendo 500 mpaka 80% mphamvu, muyamba kuwona madandaulo pafupifupi mwezi wa 18.

Ichi ndichifukwa chake Apple ndi Samsung amakulitsa mapaketi awo malinga ndi kuchuluka kwa malonda. "100%" yomwe mumawona pafoni yanu si 100% ya zomwe maselo amatha kugwira. Amasunga chotchinga pamwamba ndi pansi kuti achepetse kupsinjika kwa ma cell. Foni yanu ikhoza kukhala ndi mphamvu ya 4500mAh koma pulogalamuyo imangokulolani kugwiritsa ntchito 4000mAh yake.

Lingaliro lomwelo limagwira ntchito pamtundu uliwonse wa batri. Mutha kugunda chandamale ya moyo wanu ndi ma cell abwinoko - omwe amawononga ndalama zambiri - kapena mutha kuyigunda powonjezera mphamvu ndikuyendetsa ma cell mosavuta. Njira yachiwiri nthawi zambiri imapambana pamtengo wokwanira mukamagwiritsa ntchito nkhokwe zawaranti.

Discharge Cycle

Kuzungulira kotulutsa ndi njira yokhayo yowerengera kuvala. Monga mailosi odometer pa galimoto, koma ubale pakati pa mailosi ndi moyo wotsalira ndi squishier. Mapaketi awiri pamizere 300 amatha kukhala ndi mphamvu zotsalira zosiyana kutengera momwe adafikirako.

Opanga ma cell akupatsani manambala awo. Ntchito yanu ndikuwona momwe manambalawo amamasulira kuzinthu zanu zenizeni ndi ogwiritsa ntchito anu enieni. Palibe chilinganizo cha izo. Mumayesa, mumatumiza, mumayang'ana deta yakumunda, ndipo mumasintha.